Are you fed up with the intempestive launch of Phone application after ending a call ? Phonecloser allows to prevent Phone app from opening after an incoming or outgoing call, including FaceTime. That is how iPhone should behave ! You can see a demo video. PhoneCloser also allows to lock a call : when you are in call, your iPhone will be locked automatically or using proximity sensor.

After installation, you can configure options in Settings panel >> PhoneCloser.